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sys/nfs/nfs_syscalls.c
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1 /* $NetBSD: nfs_syscalls.c,v 1.99.2.1 2007/06/05 20:37:21 bouyer Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)nfs_syscalls.c 8.5 (Berkeley) 3/30/95 35 */ 36 37 #include <sys/cdefs.h> 38 __KERNEL_RCSID(0, "$NetBSD: nfs_syscalls.c,v 1.99.2.1 2007/06/05 20:37:21 bouyer Exp $"); 39 40 #include "fs_nfs.h" 41 #include "opt_nfs.h" 42 #include "opt_nfsserver.h" 43 #include "opt_iso.h" 44 #include "opt_inet.h" 45 #include "opt_compat_netbsd.h" 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/kernel.h> 50 #include <sys/file.h> 51 #include <sys/stat.h> 52 #include <sys/vnode.h> 53 #include <sys/mount.h> 54 #include <sys/proc.h> 55 #include <sys/uio.h> 56 #include <sys/malloc.h> 57 #include <sys/buf.h> 58 #include <sys/mbuf.h> 59 #include <sys/socket.h> 60 #include <sys/socketvar.h> 61 #include <sys/signalvar.h> 62 #include <sys/domain.h> 63 #include <sys/protosw.h> 64 #include <sys/namei.h> 65 #include <sys/syslog.h> 66 #include <sys/filedesc.h> 67 #include <sys/kthread.h> 68 #include <sys/kauth.h> 69 70 #include <sys/sa.h> 71 #include <sys/syscallargs.h> 72 73 #include <netinet/in.h> 74 #include <netinet/tcp.h> 75 #ifdef ISO 76 #include <netiso/iso.h> 77 #endif 78 #include <nfs/xdr_subs.h> 79 #include <nfs/rpcv2.h> 80 #include <nfs/nfsproto.h> 81 #include <nfs/nfs.h> 82 #include <nfs/nfsm_subs.h> 83 #include <nfs/nfsrvcache.h> 84 #include <nfs/nfsmount.h> 85 #include <nfs/nfsnode.h> 86 #include <nfs/nqnfs.h> 87 #include <nfs/nfsrtt.h> 88 #include <nfs/nfs_var.h> 89 90 /* Global defs. */ 91 extern int32_t (*nfsrv3_procs[NFS_NPROCS]) __P((struct nfsrv_descript *, 92 struct nfssvc_sock *, 93 struct lwp *, struct mbuf **)); 94 extern time_t nqnfsstarttime; 95 extern int nfsrvw_procrastinate; 96 97 struct nfssvc_sock *nfs_udpsock; 98 #ifdef ISO 99 struct nfssvc_sock *nfs_cltpsock; 100 #endif 101 #ifdef INET6 102 struct nfssvc_sock *nfs_udp6sock; 103 #endif 104 int nuidhash_max = NFS_MAXUIDHASH; 105 int nfsd_waiting = 0; 106 #ifdef NFSSERVER 107 static int nfs_numnfsd = 0; 108 static int notstarted = 1; 109 static int modify_flag = 0; 110 static struct nfsdrt nfsdrt; 111 #endif 112 113 #ifdef NFSSERVER 114 struct simplelock nfsd_slock = SIMPLELOCK_INITIALIZER; 115 struct nfssvc_sockhead nfssvc_sockhead; 116 struct nfssvc_sockhead nfssvc_sockpending; 117 struct nfsdhead nfsd_head; 118 struct nfsdidlehead nfsd_idle_head; 119 120 int nfssvc_sockhead_flag; 121 int nfsd_head_flag; 122 #endif 123 124 MALLOC_DEFINE(M_NFSUID, "NFS uid", "Nfs uid mapping structure"); 125 126 #ifdef NFS 127 struct nfs_iod nfs_asyncdaemon[NFS_MAXASYNCDAEMON]; 128 int nfs_niothreads = -1; /* == "0, and has never been set" */ 129 #endif 130 131 #ifdef NFSSERVER 132 static struct nfssvc_sock *nfsrv_sockalloc __P((void)); 133 static void nfsrv_sockfree __P((struct nfssvc_sock *)); 134 static void nfsd_rt __P((int, struct nfsrv_descript *, int)); 135 #endif 136 137 /* 138 * NFS server system calls 139 */ 140 141 142 /* 143 * Nfs server pseudo system call for the nfsd's 144 * Based on the flag value it either: 145 * - adds a socket to the selection list 146 * - remains in the kernel as an nfsd 147 * - remains in the kernel as an nfsiod 148 */ 149 int 150 sys_nfssvc(struct lwp *l, void *v, register_t *retval) 151 { 152 struct sys_nfssvc_args /* { 153 syscallarg(int) flag; 154 syscallarg(caddr_t) argp; 155 } */ *uap = v; 156 int error; 157 #ifdef NFS 158 struct nameidata nd; 159 struct nfsmount *nmp; 160 struct nfsd_cargs ncd; 161 #endif 162 #ifdef NFSSERVER 163 int s; 164 struct file *fp; 165 struct mbuf *nam; 166 struct nfsd_args nfsdarg; 167 struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs; 168 struct nfsd *nfsd; 169 struct nfssvc_sock *slp; 170 struct nfsuid *nuidp; 171 #endif 172 173 /* 174 * Must be super user 175 */ 176 error = kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, 177 &l->l_acflag); 178 if (error) 179 return (error); 180 181 /* Initialize NFS server / client shared data. */ 182 nfs_init(); 183 184 #ifdef NFSSERVER 185 s = splsoftnet(); 186 simple_lock(&nfsd_slock); 187 while (nfssvc_sockhead_flag & SLP_INIT) { 188 nfssvc_sockhead_flag |= SLP_WANTINIT; 189 (void) ltsleep(&nfssvc_sockhead, PSOCK, "nfsd init", 0, 190 &nfsd_slock); 191 } 192 simple_unlock(&nfsd_slock); 193 splx(s); 194 #endif 195 if (SCARG(uap, flag) & NFSSVC_BIOD) { 196 #if defined(NFS) && defined(COMPAT_14) 197 error = nfssvc_iod(l); 198 #else 199 error = ENOSYS; 200 #endif 201 } else if (SCARG(uap, flag) & NFSSVC_MNTD) { 202 #ifndef NFS 203 error = ENOSYS; 204 #else 205 error = copyin(SCARG(uap, argp), (caddr_t)&ncd, sizeof (ncd)); 206 if (error) 207 return (error); 208 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 209 ncd.ncd_dirp, l); 210 error = namei(&nd); 211 if (error) 212 return (error); 213 if ((nd.ni_vp->v_flag & VROOT) == 0) 214 error = EINVAL; 215 nmp = VFSTONFS(nd.ni_vp->v_mount); 216 vput(nd.ni_vp); 217 if (error) 218 return (error); 219 if ((nmp->nm_iflag & NFSMNT_MNTD) && 220 (SCARG(uap, flag) & NFSSVC_GOTAUTH) == 0) 221 return (0); 222 nmp->nm_iflag |= NFSMNT_MNTD; 223 error = nqnfs_clientd(nmp, l->l_cred, &ncd, SCARG(uap, flag), 224 SCARG(uap, argp), l); 225 #endif /* NFS */ 226 } else if (SCARG(uap, flag) & NFSSVC_ADDSOCK) { 227 #ifndef NFSSERVER 228 error = ENOSYS; 229 #else 230 error = copyin(SCARG(uap, argp), (caddr_t)&nfsdarg, 231 sizeof(nfsdarg)); 232 if (error) 233 return (error); 234 /* getsock() will use the descriptor for us */ 235 error = getsock(l->l_proc->p_fd, nfsdarg.sock, &fp); 236 if (error) 237 return (error); 238 /* 239 * Get the client address for connected sockets. 240 */ 241 if (nfsdarg.name == NULL || nfsdarg.namelen == 0) 242 nam = (struct mbuf *)0; 243 else { 244 error = sockargs(&nam, nfsdarg.name, nfsdarg.namelen, 245 MT_SONAME); 246 if (error) { 247 FILE_UNUSE(fp, NULL); 248 return (error); 249 } 250 } 251 error = nfssvc_addsock(fp, nam); 252 FILE_UNUSE(fp, NULL); 253 #endif /* !NFSSERVER */ 254 } else if (SCARG(uap, flag) & NFSSVC_SETEXPORTSLIST) { 255 #ifndef NFSSERVER 256 error = ENOSYS; 257 #else 258 struct export_args *args; 259 struct mountd_exports_list mel; 260 261 error = copyin(SCARG(uap, argp), &mel, sizeof(mel)); 262 if (error != 0) 263 return error; 264 265 args = (struct export_args *)malloc(mel.mel_nexports * 266 sizeof(struct export_args), M_TEMP, M_WAITOK); 267 error = copyin(mel.mel_exports, args, mel.mel_nexports * 268 sizeof(struct export_args)); 269 if (error != 0) { 270 free(args, M_TEMP); 271 return error; 272 } 273 mel.mel_exports = args; 274 275 error = mountd_set_exports_list(&mel, l); 276 277 free(args, M_TEMP); 278 #endif /* !NFSSERVER */ 279 } else { 280 #ifndef NFSSERVER 281 error = ENOSYS; 282 #else 283 error = copyin(SCARG(uap, argp), (caddr_t)nsd, sizeof (*nsd)); 284 if (error) 285 return (error); 286 if ((SCARG(uap, flag) & NFSSVC_AUTHIN) && 287 ((nfsd = nsd->nsd_nfsd)) != NULL && 288 (nfsd->nfsd_slp->ns_flag & SLP_VALID)) { 289 slp = nfsd->nfsd_slp; 290 291 /* 292 * First check to see if another nfsd has already 293 * added this credential. 294 */ 295 LIST_FOREACH(nuidp, NUIDHASH(slp, nsd->nsd_cr.cr_uid), 296 nu_hash) { 297 if (kauth_cred_geteuid(nuidp->nu_cr) == 298 nsd->nsd_cr.cr_uid && 299 (!nfsd->nfsd_nd->nd_nam2 || 300 netaddr_match(NU_NETFAM(nuidp), 301 &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2))) 302 break; 303 } 304 if (nuidp) { 305 kauth_cred_hold(nuidp->nu_cr); 306 nfsd->nfsd_nd->nd_cr = nuidp->nu_cr; 307 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 308 } else { 309 /* 310 * Nope, so we will. 311 */ 312 if (slp->ns_numuids < nuidhash_max) { 313 slp->ns_numuids++; 314 nuidp = (struct nfsuid *) 315 malloc(sizeof (struct nfsuid), M_NFSUID, 316 M_WAITOK); 317 } else 318 nuidp = (struct nfsuid *)0; 319 if ((slp->ns_flag & SLP_VALID) == 0) { 320 if (nuidp) 321 free((caddr_t)nuidp, M_NFSUID); 322 } else { 323 if (nuidp == (struct nfsuid *)0) { 324 nuidp = TAILQ_FIRST(&slp->ns_uidlruhead); 325 LIST_REMOVE(nuidp, nu_hash); 326 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, 327 nu_lru); 328 if (nuidp->nu_flag & NU_NAM) 329 m_freem(nuidp->nu_nam); 330 } 331 nuidp->nu_flag = 0; 332 kauth_uucred_to_cred(nuidp->nu_cr, 333 &nsd->nsd_cr); 334 nuidp->nu_timestamp = nsd->nsd_timestamp; 335 nuidp->nu_expire = time_second + nsd->nsd_ttl; 336 /* 337 * and save the session key in nu_key. 338 */ 339 memcpy(nuidp->nu_key, nsd->nsd_key, 340 sizeof(nsd->nsd_key)); 341 if (nfsd->nfsd_nd->nd_nam2) { 342 struct sockaddr_in *saddr; 343 344 saddr = mtod(nfsd->nfsd_nd->nd_nam2, 345 struct sockaddr_in *); 346 switch (saddr->sin_family) { 347 case AF_INET: 348 nuidp->nu_flag |= NU_INETADDR; 349 nuidp->nu_inetaddr = 350 saddr->sin_addr.s_addr; 351 break; 352 case AF_ISO: 353 default: 354 nuidp->nu_flag |= NU_NAM; 355 nuidp->nu_nam = m_copym( 356 nfsd->nfsd_nd->nd_nam2, 0, 357 M_COPYALL, M_WAIT); 358 break; 359 }; 360 } 361 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp, 362 nu_lru); 363 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid), 364 nuidp, nu_hash); 365 kauth_cred_hold(nuidp->nu_cr); 366 nfsd->nfsd_nd->nd_cr = nuidp->nu_cr; 367 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 368 } 369 } 370 } 371 if ((SCARG(uap, flag) & NFSSVC_AUTHINFAIL) && 372 (nfsd = nsd->nsd_nfsd)) 373 nfsd->nfsd_flag |= NFSD_AUTHFAIL; 374 error = nfssvc_nfsd(nsd, SCARG(uap, argp), l); 375 #endif /* !NFSSERVER */ 376 } 377 if (error == EINTR || error == ERESTART) 378 error = 0; 379 return (error); 380 } 381 382 #ifdef NFSSERVER 383 MALLOC_DEFINE(M_NFSD, "NFS daemon", "Nfs server daemon structure"); 384 MALLOC_DEFINE(M_NFSSVC, "NFS srvsock", "Nfs server structure"); 385 386 static struct nfssvc_sock * 387 nfsrv_sockalloc() 388 { 389 struct nfssvc_sock *slp; 390 int s; 391 392 slp = (struct nfssvc_sock *) 393 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK); 394 memset(slp, 0, sizeof (struct nfssvc_sock)); 395 simple_lock_init(&slp->ns_lock); 396 TAILQ_INIT(&slp->ns_uidlruhead); 397 LIST_INIT(&slp->ns_tq); 398 SIMPLEQ_INIT(&slp->ns_sendq); 399 s = splsoftnet(); 400 simple_lock(&nfsd_slock); 401 TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain); 402 simple_unlock(&nfsd_slock); 403 splx(s); 404 405 return slp; 406 } 407 408 static void 409 nfsrv_sockfree(struct nfssvc_sock *slp) 410 { 411 412 KASSERT(slp->ns_so == NULL); 413 KASSERT(slp->ns_fp == NULL); 414 KASSERT((slp->ns_flag & SLP_VALID) == 0); 415 free(slp, M_NFSSVC); 416 } 417 418 /* 419 * Adds a socket to the list for servicing by nfsds. 420 */ 421 int 422 nfssvc_addsock(fp, mynam) 423 struct file *fp; 424 struct mbuf *mynam; 425 { 426 struct mbuf *m; 427 int siz; 428 struct nfssvc_sock *slp; 429 struct socket *so; 430 struct nfssvc_sock *tslp; 431 int error, s; 432 433 so = (struct socket *)fp->f_data; 434 tslp = (struct nfssvc_sock *)0; 435 /* 436 * Add it to the list, as required. 437 */ 438 if (so->so_proto->pr_protocol == IPPROTO_UDP) { 439 #ifdef INET6 440 if (so->so_proto->pr_domain->dom_family == AF_INET6) 441 tslp = nfs_udp6sock; 442 else 443 #endif 444 tslp = nfs_udpsock; 445 if (tslp->ns_flag & SLP_VALID) { 446 m_freem(mynam); 447 return (EPERM); 448 } 449 #ifdef ISO 450 } else if (so->so_proto->pr_protocol == ISOPROTO_CLTP) { 451 tslp = nfs_cltpsock; 452 if (tslp->ns_flag & SLP_VALID) { 453 m_freem(mynam); 454 return (EPERM); 455 } 456 #endif /* ISO */ 457 } 458 if (so->so_type == SOCK_STREAM) 459 siz = NFS_MAXPACKET + sizeof (u_long); 460 else 461 siz = NFS_MAXPACKET; 462 error = soreserve(so, siz, siz); 463 if (error) { 464 m_freem(mynam); 465 return (error); 466 } 467 468 /* 469 * Set protocol specific options { for now TCP only } and 470 * reserve some space. For datagram sockets, this can get called 471 * repeatedly for the same socket, but that isn't harmful. 472 */ 473 if (so->so_type == SOCK_STREAM) { 474 m = m_get(M_WAIT, MT_SOOPTS); 475 MCLAIM(m, &nfs_mowner); 476 *mtod(m, int32_t *) = 1; 477 m->m_len = sizeof(int32_t); 478 sosetopt(so, SOL_SOCKET, SO_KEEPALIVE, m); 479 } 480 if ((so->so_proto->pr_domain->dom_family == AF_INET 481 #ifdef INET6 482 || so->so_proto->pr_domain->dom_family == AF_INET6 483 #endif 484 ) && 485 so->so_proto->pr_protocol == IPPROTO_TCP) { 486 m = m_get(M_WAIT, MT_SOOPTS); 487 MCLAIM(m, &nfs_mowner); 488 *mtod(m, int32_t *) = 1; 489 m->m_len = sizeof(int32_t); 490 sosetopt(so, IPPROTO_TCP, TCP_NODELAY, m); 491 } 492 so->so_rcv.sb_flags &= ~SB_NOINTR; 493 so->so_rcv.sb_timeo = 0; 494 so->so_snd.sb_flags &= ~SB_NOINTR; 495 so->so_snd.sb_timeo = 0; 496 if (tslp) 497 slp = tslp; 498 else { 499 slp = nfsrv_sockalloc(); 500 } 501 slp->ns_so = so; 502 slp->ns_nam = mynam; 503 fp->f_count++; 504 slp->ns_fp = fp; 505 s = splsoftnet(); 506 so->so_upcallarg = (caddr_t)slp; 507 so->so_upcall = nfsrv_rcv; 508 so->so_rcv.sb_flags |= SB_UPCALL; 509 slp->ns_flag = (SLP_VALID | SLP_NEEDQ); 510 nfsrv_wakenfsd(slp); 511 splx(s); 512 return (0); 513 } 514 515 /* 516 * Called by nfssvc() for nfsds. Just loops around servicing rpc requests 517 * until it is killed by a signal. 518 */ 519 int 520 nfssvc_nfsd(nsd, argp, l) 521 struct nfsd_srvargs *nsd; 522 caddr_t argp; 523 struct lwp *l; 524 { 525 struct timeval tv; 526 struct mbuf *m; 527 struct nfssvc_sock *slp; 528 struct nfsd *nfsd = nsd->nsd_nfsd; 529 struct nfsrv_descript *nd = NULL; 530 struct mbuf *mreq; 531 u_quad_t cur_usec; 532 int error = 0, cacherep, s, siz, sotype, writes_todo; 533 struct proc *p = l->l_proc; 534 535 #ifndef nolint 536 cacherep = RC_DOIT; 537 writes_todo = 0; 538 #endif 539 s = splsoftnet(); 540 if (nfsd == (struct nfsd *)0) { 541 nsd->nsd_nfsd = nfsd = (struct nfsd *) 542 malloc(sizeof (struct nfsd), M_NFSD, M_WAITOK); 543 memset((caddr_t)nfsd, 0, sizeof (struct nfsd)); 544 nfsd->nfsd_procp = p; 545 simple_lock(&nfsd_slock); 546 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain); 547 nfs_numnfsd++; 548 simple_unlock(&nfsd_slock); 549 } 550 PHOLD(l); 551 /* 552 * Loop getting rpc requests until SIGKILL. 553 */ 554 for (;;) { 555 if (nfsd->nfsd_slp == NULL) { 556 simple_lock(&nfsd_slock); 557 while (nfsd->nfsd_slp == NULL && 558 (nfsd_head_flag & NFSD_CHECKSLP) == 0) { 559 SLIST_INSERT_HEAD(&nfsd_idle_head, nfsd, 560 nfsd_idle); 561 nfsd_waiting++; 562 error = ltsleep(nfsd, PSOCK | PCATCH, "nfsd", 563 0, &nfsd_slock); 564 nfsd_waiting--; 565 if (error) { 566 slp = nfsd->nfsd_slp; 567 nfsd->nfsd_slp = NULL; 568 if (!slp) 569 SLIST_REMOVE(&nfsd_idle_head, 570 nfsd, nfsd, nfsd_idle); 571 simple_unlock(&nfsd_slock); 572 if (slp) { 573 nfsrv_wakenfsd(slp); 574 nfsrv_slpderef(slp); 575 } 576 goto done; 577 } 578 } 579 if (nfsd->nfsd_slp == NULL && 580 (nfsd_head_flag & NFSD_CHECKSLP) != 0) { 581 slp = TAILQ_FIRST(&nfssvc_sockpending); 582 if (slp) { 583 KASSERT((slp->ns_flag & 584 (SLP_VALID | SLP_DOREC)) 585 == (SLP_VALID | SLP_DOREC)); 586 TAILQ_REMOVE(&nfssvc_sockpending, slp, 587 ns_pending); 588 slp->ns_flag &= ~SLP_DOREC; 589 slp->ns_sref++; 590 nfsd->nfsd_slp = slp; 591 } else 592 nfsd_head_flag &= ~NFSD_CHECKSLP; 593 } 594 simple_unlock(&nfsd_slock); 595 if ((slp = nfsd->nfsd_slp) == NULL) 596 continue; 597 if (slp->ns_flag & SLP_VALID) { 598 if (slp->ns_flag & SLP_DISCONN) 599 nfsrv_zapsock(slp); 600 else if ((slp->ns_flag & SLP_NEEDQ) != 0) { 601 nfsrv_rcv(slp->ns_so, (void *)slp, 602 M_WAIT); 603 } 604 error = nfsrv_dorec(slp, nfsd, &nd); 605 getmicrotime(&tv); 606 cur_usec = (u_quad_t)tv.tv_sec * 1000000 + 607 (u_quad_t)tv.tv_usec; 608 if (error && LIST_FIRST(&slp->ns_tq) && 609 LIST_FIRST(&slp->ns_tq)->nd_time <= 610 cur_usec) { 611 error = 0; 612 cacherep = RC_DOIT; 613 writes_todo = 1; 614 } else 615 writes_todo = 0; 616 if (error == 0 && slp->ns_rec != NULL) { 617 nfsrv_wakenfsd(slp); 618 } 619 } 620 } else { 621 error = 0; 622 slp = nfsd->nfsd_slp; 623 } 624 if (error || (slp->ns_flag & SLP_VALID) == 0) { 625 if (nd) { 626 nfsdreq_free(nd); 627 nd = NULL; 628 } 629 nfsd->nfsd_slp = NULL; 630 nfsrv_slpderef(slp); 631 continue; 632 } 633 splx(s); 634 sotype = slp->ns_so->so_type; 635 if (nd) { 636 getmicrotime(&nd->nd_starttime); 637 if (nd->nd_nam2) 638 nd->nd_nam = nd->nd_nam2; 639 else 640 nd->nd_nam = slp->ns_nam; 641 642 /* 643 * Check to see if authorization is needed. 644 */ 645 if (nfsd->nfsd_flag & NFSD_NEEDAUTH) { 646 nfsd->nfsd_flag &= ~NFSD_NEEDAUTH; 647 nsd->nsd_haddr = mtod(nd->nd_nam, 648 struct sockaddr_in *)->sin_addr.s_addr; 649 nsd->nsd_authlen = nfsd->nfsd_authlen; 650 nsd->nsd_verflen = nfsd->nfsd_verflen; 651 if (!copyout(nfsd->nfsd_authstr, 652 nsd->nsd_authstr, nfsd->nfsd_authlen) && 653 !copyout(nfsd->nfsd_verfstr, 654 nsd->nsd_verfstr, nfsd->nfsd_verflen) && 655 !copyout(nsd, argp, sizeof (*nsd))) { 656 PRELE(l); 657 return (ENEEDAUTH); 658 } 659 cacherep = RC_DROPIT; 660 } else 661 cacherep = nfsrv_getcache(nd, slp, &mreq); 662 663 /* 664 * Check for just starting up for NQNFS and send 665 * fake "try again later" replies to the NQNFS clients. 666 */ 667 if (notstarted && nqnfsstarttime <= time_second) { 668 if (modify_flag) { 669 nqnfsstarttime = 670 time_second + nqsrv_writeslack; 671 modify_flag = 0; 672 } else 673 notstarted = 0; 674 } 675 if (notstarted) { 676 if ((nd->nd_flag & ND_NQNFS) == 0) 677 cacherep = RC_DROPIT; 678 else if (nd->nd_procnum != NFSPROC_WRITE) { 679 nd->nd_procnum = NFSPROC_NOOP; 680 nd->nd_repstat = NQNFS_TRYLATER; 681 cacherep = RC_DOIT; 682 } else 683 modify_flag = 1; 684 } else if (nfsd->nfsd_flag & NFSD_AUTHFAIL) { 685 nfsd->nfsd_flag &= ~NFSD_AUTHFAIL; 686 nd->nd_procnum = NFSPROC_NOOP; 687 nd->nd_repstat = 688 (NFSERR_AUTHERR | AUTH_TOOWEAK); 689 cacherep = RC_DOIT; 690 } 691 } 692 693 /* 694 * Loop to get all the write rpc relies that have been 695 * gathered together. 696 */ 697 do { 698 #ifdef DIAGNOSTIC 699 int lockcount; 700 #endif 701 switch (cacherep) { 702 case RC_DOIT: 703 #ifdef DIAGNOSTIC 704 /* 705 * NFS server procs should neither release 706 * locks already held, nor leave things 707 * locked. Catch this sooner, rather than 708 * later (when we try to relock something we 709 * already have locked). Careful inspection 710 * of the failing routine usually turns up the 711 * lock leak.. once we know what it is.. 712 */ 713 lockcount = l->l_locks; 714 #endif 715 mreq = NULL; 716 netexport_rdlock(); 717 if (writes_todo || nd == NULL || 718 (!(nd->nd_flag & ND_NFSV3) && 719 nd->nd_procnum == NFSPROC_WRITE && 720 nfsrvw_procrastinate > 0 && !notstarted)) 721 error = nfsrv_writegather(&nd, slp, 722 l, &mreq); 723 else 724 error = 725 (*(nfsrv3_procs[nd->nd_procnum])) 726 (nd, slp, l, &mreq); 727 netexport_rdunlock(); 728 #ifdef DIAGNOSTIC 729 if (l->l_locks != lockcount) { 730 /* 731 * If you see this panic, audit 732 * nfsrv3_procs[nd->nd_procnum] for 733 * vnode locking errors (usually, it's 734 * due to forgetting to vput() 735 * something). 736 */ 737 #ifdef DEBUG 738 extern void printlockedvnodes(void); 739 printlockedvnodes(); 740 #endif 741 printf("nfsd: locking botch in op %d" 742 " (before %d, after %d)\n", 743 nd ? nd->nd_procnum : -1, 744 lockcount, l->l_locks); 745 } 746 #endif 747 if (mreq == NULL) { 748 if (nd != NULL) { 749 if (nd->nd_nam2) 750 m_free(nd->nd_nam2); 751 if (nd->nd_mrep) 752 m_freem(nd->nd_mrep); 753 } 754 break; 755 } 756 if (error) { 757 if (nd->nd_procnum != NQNFSPROC_VACATED) 758 nfsstats.srv_errs++; 759 nfsrv_updatecache(nd, FALSE, mreq); 760 if (nd->nd_nam2) 761 m_freem(nd->nd_nam2); 762 break; 763 } 764 nfsstats.srvrpccnt[nd->nd_procnum]++; 765 nfsrv_updatecache(nd, TRUE, mreq); 766 nd->nd_mrep = (struct mbuf *)0; 767 case RC_REPLY: 768 m = mreq; 769 siz = 0; 770 while (m) { 771 siz += m->m_len; 772 m = m->m_next; 773 } 774 if (siz <= 0 || siz > NFS_MAXPACKET) { 775 printf("mbuf siz=%d\n",siz); 776 panic("Bad nfs svc reply"); 777 } 778 m = mreq; 779 m->m_pkthdr.len = siz; 780 m->m_pkthdr.rcvif = (struct ifnet *)0; 781 /* 782 * For stream protocols, prepend a Sun RPC 783 * Record Mark. 784 */ 785 if (sotype == SOCK_STREAM) { 786 M_PREPEND(m, NFSX_UNSIGNED, M_WAIT); 787 *mtod(m, u_int32_t *) = 788 htonl(0x80000000 | siz); 789 } 790 nd->nd_mreq = m; 791 if (nfsrtton) { 792 nfsd_rt(slp->ns_so->so_type, nd, 793 cacherep); 794 } 795 s = splsoftnet(); 796 error = nfsdsock_sendreply(slp, nd); 797 nd = NULL; 798 if (error == EPIPE) 799 nfsrv_zapsock(slp); 800 if (error == EINTR || error == ERESTART) { 801 nfsrv_slpderef(slp); 802 goto done; 803 } 804 splx(s); 805 break; 806 case RC_DROPIT: 807 if (nfsrtton) 808 nfsd_rt(sotype, nd, cacherep); 809 m_freem(nd->nd_mrep); 810 m_freem(nd->nd_nam2); 811 break; 812 } 813 if (nd) { 814 nfsdreq_free(nd); 815 nd = NULL; 816 } 817 818 /* 819 * Check to see if there are outstanding writes that 820 * need to be serviced. 821 */ 822 getmicrotime(&tv); 823 cur_usec = (u_quad_t)tv.tv_sec * 1000000 + 824 (u_quad_t)tv.tv_usec; 825 s = splsoftclock(); 826 if (LIST_FIRST(&slp->ns_tq) && 827 LIST_FIRST(&slp->ns_tq)->nd_time <= cur_usec) { 828 cacherep = RC_DOIT; 829 writes_todo = 1; 830 } else 831 writes_todo = 0; 832 splx(s); 833 } while (writes_todo); 834 s = splsoftnet(); 835 if (nfsrv_dorec(slp, nfsd, &nd)) { 836 nfsd->nfsd_slp = NULL; 837 nfsrv_slpderef(slp); 838 } 839 } 840 done: 841 PRELE(l); 842 simple_lock(&nfsd_slock); 843 TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain); 844 simple_unlock(&nfsd_slock); 845 splx(s); 846 free((caddr_t)nfsd, M_NFSD); 847 nsd->nsd_nfsd = (struct nfsd *)0; 848 if (--nfs_numnfsd == 0) 849 nfsrv_init(TRUE); /* Reinitialize everything */ 850 return (error); 851 } 852 853 /* 854 * Shut down a socket associated with an nfssvc_sock structure. 855 * Should be called with the send lock set, if required. 856 * The trick here is to increment the sref at the start, so that the nfsds 857 * will stop using it and clear ns_flag at the end so that it will not be 858 * reassigned during cleanup. 859 * 860 * called at splsoftnet. 861 */ 862 void 863 nfsrv_zapsock(slp) 864 struct nfssvc_sock *slp; 865 { 866 struct nfsuid *nuidp, *nnuidp; 867 struct nfsrv_descript *nwp, *nnwp; 868 struct socket *so; 869 struct mbuf *m; 870 int s; 871 872 if (nfsdsock_drain(slp)) { 873 return; 874 } 875 simple_lock(&nfsd_slock); 876 if (slp->ns_flag & SLP_DOREC) { 877 TAILQ_REMOVE(&nfssvc_sockpending, slp, ns_pending); 878 } 879 simple_unlock(&nfsd_slock); 880 881 so = slp->ns_so; 882 KASSERT(so != NULL); 883 so->so_upcall = NULL; 884 so->so_upcallarg = NULL; 885 so->so_rcv.sb_flags &= ~SB_UPCALL; 886 soshutdown(so, SHUT_RDWR); 887 888 if (slp->ns_nam) 889 m_free(slp->ns_nam); 890 m_freem(slp->ns_raw); 891 m = slp->ns_rec; 892 while (m != NULL) { 893 struct mbuf *n; 894 895 n = m->m_nextpkt; 896 m_freem(m); 897 m = n; 898 } 899 for (nuidp = TAILQ_FIRST(&slp->ns_uidlruhead); nuidp != 0; 900 nuidp = nnuidp) { 901 nnuidp = TAILQ_NEXT(nuidp, nu_lru); 902 LIST_REMOVE(nuidp, nu_hash); 903 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru); 904 if (nuidp->nu_flag & NU_NAM) 905 m_freem(nuidp->nu_nam); 906 free((caddr_t)nuidp, M_NFSUID); 907 } 908 s = splsoftclock(); 909 for (nwp = LIST_FIRST(&slp->ns_tq); nwp; nwp = nnwp) { 910 nnwp = LIST_NEXT(nwp, nd_tq); 911 LIST_REMOVE(nwp, nd_tq); 912 nfsdreq_free(nwp); 913 } 914 splx(s); 915 } 916 917 /* 918 * Derefence a server socket structure. If it has no more references and 919 * is no longer valid, you can throw it away. 920 */ 921 void 922 nfsrv_slpderef(slp) 923 struct nfssvc_sock *slp; 924 { 925 LOCK_ASSERT(!simple_lock_held(&nfsd_slock)); 926 927 if (--(slp->ns_sref) == 0 && (slp->ns_flag & SLP_VALID) == 0) { 928 struct file *fp; 929 int s = splsoftnet(); 930 simple_lock(&nfsd_slock); 931 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain); 932 simple_unlock(&nfsd_slock); 933 splx(s); 934 935 fp = slp->ns_fp; 936 if (fp != NULL) { 937 slp->ns_fp = NULL; 938 KASSERT(fp != NULL); 939 KASSERT(fp->f_data == slp->ns_so); 940 simple_lock(&fp->f_slock); 941 FILE_USE(fp); 942 closef(fp, (struct lwp *)0); 943 slp->ns_so = NULL; 944 } 945 946 nfsrv_sockfree(slp); 947 } 948 } 949 950 /* 951 * Initialize the data structures for the server. 952 * Handshake with any new nfsds starting up to avoid any chance of 953 * corruption. 954 */ 955 void 956 nfsrv_init(terminating) 957 int terminating; 958 { 959 struct nfssvc_sock *slp; 960 int s; 961 962 s = splsoftnet(); 963 simple_lock(&nfsd_slock); 964 if (nfssvc_sockhead_flag & SLP_INIT) 965 panic("nfsd init"); 966 nfssvc_sockhead_flag |= SLP_INIT; 967 968 if (terminating) { 969 while ((slp = TAILQ_FIRST(&nfssvc_sockhead)) != NULL) { 970 simple_unlock(&nfsd_slock); 971 KASSERT(slp->ns_sref == 0); 972 slp->ns_sref++; 973 nfsrv_zapsock(slp); 974 nfsrv_slpderef(slp); 975 simple_lock(&nfsd_slock); 976 } 977 simple_unlock(&nfsd_slock); 978 splx(s); 979 nfsrv_cleancache(); /* And clear out server cache */ 980 } else { 981 simple_unlock(&nfsd_slock); 982 splx(s); 983 nfs_pub.np_valid = 0; 984 } 985 986 TAILQ_INIT(&nfssvc_sockhead); 987 TAILQ_INIT(&nfssvc_sockpending); 988 nfssvc_sockhead_flag &= ~SLP_INIT; 989 990 TAILQ_INIT(&nfsd_head); 991 SLIST_INIT(&nfsd_idle_head); 992 nfsd_head_flag &= ~NFSD_CHECKSLP; 993 994 nfs_udpsock = nfsrv_sockalloc(); 995 996 #ifdef INET6 997 nfs_udp6sock = nfsrv_sockalloc(); 998 #endif 999 1000 #ifdef ISO 1001 nfs_cltpsock = nfsrv_sockalloc(); 1002 #endif 1003 1004 simple_lock(&nfsd_slock); 1005 if (nfssvc_sockhead_flag & SLP_WANTINIT) { 1006 nfssvc_sockhead_flag &= ~SLP_WANTINIT; 1007 wakeup(&nfssvc_sockhead); 1008 } 1009 simple_unlock(&nfsd_slock); 1010 splx(s); 1011 } 1012 1013 /* 1014 * Add entries to the server monitor log. 1015 */ 1016 static void 1017 nfsd_rt(sotype, nd, cacherep) 1018 int sotype; 1019 struct nfsrv_descript *nd; 1020 int cacherep; 1021 { 1022 struct timeval tv; 1023 struct drt *rt; 1024 1025 rt = &nfsdrt.drt[nfsdrt.pos]; 1026 if (cacherep == RC_DOIT) 1027 rt->flag = 0; 1028 else if (cacherep == RC_REPLY) 1029 rt->flag = DRT_CACHEREPLY; 1030 else 1031 rt->flag = DRT_CACHEDROP; 1032 if (sotype == SOCK_STREAM) 1033 rt->flag |= DRT_TCP; 1034 if (nd->nd_flag & ND_NQNFS) 1035 rt->flag |= DRT_NQNFS; 1036 else if (nd->nd_flag & ND_NFSV3) 1037 rt->flag |= DRT_NFSV3; 1038 rt->proc = nd->nd_procnum; 1039 if (mtod(nd->nd_nam, struct sockaddr *)->sa_family == AF_INET) 1040 rt->ipadr = mtod(nd->nd_nam, struct sockaddr_in *)->sin_addr.s_addr; 1041 else 1042 rt->ipadr = INADDR_ANY; 1043 getmicrotime(&tv); 1044 rt->resptime = ((tv.tv_sec - nd->nd_starttime.tv_sec) * 1000000) + 1045 (tv.tv_usec - nd->nd_starttime.tv_usec); 1046 rt->tstamp = tv; 1047 nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ; 1048 } 1049 #endif /* NFSSERVER */ 1050 1051 #ifdef NFS 1052 1053 int nfs_defect = 0; 1054 /* 1055 * Asynchronous I/O threads for client nfs. 1056 * They do read-ahead and write-behind operations on the block I/O cache. 1057 * Never returns unless it fails or gets killed. 1058 */ 1059 1060 int 1061 nfssvc_iod(l) 1062 struct lwp *l; 1063 { 1064 struct buf *bp; 1065 int i; 1066 struct nfs_iod *myiod; 1067 struct nfsmount *nmp; 1068 int error = 0; 1069 struct proc *p = l->l_proc; 1070 1071 /* 1072 * Assign my position or return error if too many already running 1073 */ 1074 myiod = NULL; 1075 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 1076 if (nfs_asyncdaemon[i].nid_proc == NULL) { 1077 myiod = &nfs_asyncdaemon[i]; 1078 break; 1079 } 1080 if (myiod == NULL) 1081 return (EBUSY); 1082 myiod->nid_proc = p; 1083 nfs_numasync++; 1084 PHOLD(l); 1085 /* 1086 * Just loop around doing our stuff until SIGKILL 1087 */ 1088 for (;;) { 1089 while (/*CONSTCOND*/ TRUE) { 1090 simple_lock(&myiod->nid_slock); 1091 nmp = myiod->nid_mount; 1092 if (nmp) { 1093 simple_lock(&nmp->nm_slock); 1094 if (!TAILQ_EMPTY(&nmp->nm_bufq)) { 1095 simple_unlock(&myiod->nid_slock); 1096 break; 1097 } 1098 nmp->nm_bufqiods--; 1099 simple_unlock(&nmp->nm_slock); 1100 } 1101 myiod->nid_want = p; 1102 myiod->nid_mount = NULL; 1103 error = ltsleep(&myiod->nid_want, 1104 PWAIT | PCATCH | PNORELOCK, "nfsidl", 0, 1105 &myiod->nid_slock); 1106 if (error) 1107 goto quit; 1108 } 1109 1110 while ((bp = TAILQ_FIRST(&nmp->nm_bufq)) != NULL) { 1111 /* Take one off the front of the list */ 1112 TAILQ_REMOVE(&nmp->nm_bufq, bp, b_freelist); 1113 nmp->nm_bufqlen--; 1114 if (nmp->nm_bufqwant && 1115 nmp->nm_bufqlen < 2 * nfs_numasync) { 1116 nmp->nm_bufqwant = FALSE; 1117 wakeup(&nmp->nm_bufq); 1118 } 1119 simple_unlock(&nmp->nm_slock); 1120 (void)nfs_doio(bp); 1121 simple_lock(&nmp->nm_slock); 1122 /* 1123 * If there are more than one iod on this mount, 1124 * then defect so that the iods can be shared out 1125 * fairly between the mounts 1126 */ 1127 if (nfs_defect && nmp->nm_bufqiods > 1) { 1128 myiod->nid_mount = NULL; 1129 nmp->nm_bufqiods--; 1130 break; 1131 } 1132 } 1133 simple_unlock(&nmp->nm_slock); 1134 } 1135 quit: 1136 PRELE(l); 1137 if (nmp) 1138 nmp->nm_bufqiods--; 1139 myiod->nid_want = NULL; 1140 myiod->nid_mount = NULL; 1141 myiod->nid_proc = NULL; 1142 nfs_numasync--; 1143 1144 return error; 1145 } 1146 1147 void 1148 nfs_iodinit() 1149 { 1150 int i; 1151 1152 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 1153 simple_lock_init(&nfs_asyncdaemon[i].nid_slock); 1154 } 1155 1156 void 1157 start_nfsio(void *arg) 1158 { 1159 nfssvc_iod(curlwp); 1160 1161 kthread_exit(0); 1162 } 1163 1164 void 1165 nfs_getset_niothreads(set) 1166 int set; 1167 { 1168 int i, have, start; 1169 1170 for (have = 0, i = 0; i < NFS_MAXASYNCDAEMON; i++) 1171 if (nfs_asyncdaemon[i].nid_proc != NULL) 1172 have++; 1173 1174 if (set) { 1175 /* clamp to sane range */ 1176 nfs_niothreads = max(0, min(nfs_niothreads, NFS_MAXASYNCDAEMON)); 1177 1178 start = nfs_niothreads - have; 1179 1180 while (start > 0) { 1181 kthread_create1(start_nfsio, NULL, NULL, "nfsio"); 1182 start--; 1183 } 1184 1185 for (i = 0; (start < 0) && (i < NFS_MAXASYNCDAEMON); i++) 1186 if (nfs_asyncdaemon[i].nid_proc != NULL) { 1187 psignal(nfs_asyncdaemon[i].nid_proc, SIGKILL); 1188 start++; 1189 } 1190 } else { 1191 if (nfs_niothreads >= 0) 1192 nfs_niothreads = have; 1193 } 1194 } 1195 1196 /* 1197 * Get an authorization string for the uid by having the mount_nfs sitting 1198 * on this mount point porpous out of the kernel and do it. 1199 */ 1200 int 1201 nfs_getauth(nmp, rep, cred, auth_str, auth_len, verf_str, verf_len, key) 1202 struct nfsmount *nmp; 1203 struct nfsreq *rep; 1204 kauth_cred_t cred; 1205 char **auth_str; 1206 int *auth_len; 1207 char *verf_str; 1208 int *verf_len; 1209 NFSKERBKEY_T key; /* return session key */ 1210 { 1211 int error = 0; 1212 1213 while ((nmp->nm_iflag & NFSMNT_WAITAUTH) == 0) { 1214 nmp->nm_iflag |= NFSMNT_WANTAUTH; 1215 (void) tsleep((caddr_t)&nmp->nm_authtype, PSOCK, 1216 "nfsauth1", 2 * hz); 1217 error = nfs_sigintr(nmp, rep, rep->r_lwp); 1218 if (error) { 1219 nmp->nm_iflag &= ~NFSMNT_WANTAUTH; 1220 return (error); 1221 } 1222 } 1223 nmp->nm_iflag &= ~(NFSMNT_WAITAUTH | NFSMNT_WANTAUTH); 1224 nmp->nm_authstr = *auth_str = (char *)malloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK); 1225 nmp->nm_authlen = RPCAUTH_MAXSIZ; 1226 nmp->nm_verfstr = verf_str; 1227 nmp->nm_verflen = *verf_len; 1228 nmp->nm_authuid = kauth_cred_geteuid(cred); 1229 wakeup((caddr_t)&nmp->nm_authstr); 1230 1231 /* 1232 * And wait for mount_nfs to do its stuff. 1233 */ 1234 while ((nmp->nm_iflag & NFSMNT_HASAUTH) == 0 && error == 0) { 1235 (void) tsleep((caddr_t)&nmp->nm_authlen, PSOCK, 1236 "nfsauth2", 2 * hz); 1237 error = nfs_sigintr(nmp, rep, rep->r_lwp); 1238 } 1239 if (nmp->nm_iflag & NFSMNT_AUTHERR) { 1240 nmp->nm_iflag &= ~NFSMNT_AUTHERR; 1241 error = EAUTH; 1242 } 1243 if (error) 1244 free((caddr_t)*auth_str, M_TEMP); 1245 else { 1246 *auth_len = nmp->nm_authlen; 1247 *verf_len = nmp->nm_verflen; 1248 memcpy(key, nmp->nm_key, sizeof (NFSKERBKEY_T)); 1249 } 1250 nmp->nm_iflag &= ~NFSMNT_HASAUTH; 1251 nmp->nm_iflag |= NFSMNT_WAITAUTH; 1252 if (nmp->nm_iflag & NFSMNT_WANTAUTH) { 1253 nmp->nm_iflag &= ~NFSMNT_WANTAUTH; 1254 wakeup((caddr_t)&nmp->nm_authtype); 1255 } 1256 return (error); 1257 } 1258 1259 /* 1260 * Get a nickname authenticator and verifier. 1261 */ 1262 int 1263 nfs_getnickauth(struct nfsmount *nmp, kauth_cred_t cred, char **auth_str, 1264 int *auth_len, char *verf_str, int verf_len) 1265 { 1266 struct timeval ktvin, ktvout, tv; 1267 struct nfsuid *nuidp; 1268 u_int32_t *nickp, *verfp; 1269 1270 memset(&ktvout, 0, sizeof ktvout); /* XXX gcc */ 1271 1272 #ifdef DIAGNOSTIC 1273 if (verf_len < (4 * NFSX_UNSIGNED)) 1274 panic("nfs_getnickauth verf too small"); 1275 #endif 1276 LIST_FOREACH(nuidp, NMUIDHASH(nmp, kauth_cred_geteuid(cred)), nu_hash) { 1277 if (kauth_cred_geteuid(nuidp->nu_cr) == kauth_cred_geteuid(cred)) 1278 break; 1279 } 1280 if (!nuidp || nuidp->nu_expire < time_second) 1281 return (EACCES); 1282 1283 /* 1284 * Move to the end of the lru list (end of lru == most recently used). 1285 */ 1286 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru); 1287 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru); 1288 1289 nickp = (u_int32_t *)malloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK); 1290 *nickp++ = txdr_unsigned(RPCAKN_NICKNAME); 1291 *nickp = txdr_unsigned(nuidp->nu_nickname); 1292 *auth_str = (char *)nickp; 1293 *auth_len = 2 * NFSX_UNSIGNED; 1294 1295 /* 1296 * Now we must encrypt the verifier and package it up. 1297 */ 1298 verfp = (u_int32_t *)verf_str; 1299 *verfp++ = txdr_unsigned(RPCAKN_NICKNAME); 1300 getmicrotime(&tv); 1301 if (tv.tv_sec > nuidp->nu_timestamp.tv_sec || 1302 (tv.tv_sec == nuidp->nu_timestamp.tv_sec && 1303 tv.tv_usec > nuidp->nu_timestamp.tv_usec)) 1304 nuidp->nu_timestamp = tv; 1305 else 1306 nuidp->nu_timestamp.tv_usec++; 1307 ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec); 1308 ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec); 1309 1310 /* 1311 * Now encrypt the timestamp verifier in ecb mode using the session 1312 * key. 1313 */ 1314 #ifdef NFSKERB 1315 XXX 1316 #endif 1317 1318 *verfp++ = ktvout.tv_sec; 1319 *verfp++ = ktvout.tv_usec; 1320 *verfp = 0; 1321 return (0); 1322 } 1323 1324 /* 1325 * Save the current nickname in a hash list entry on the mount point. 1326 */ 1327 int 1328 nfs_savenickauth(nmp, cred, len, key, mdp, dposp, mrep) 1329 struct nfsmount *nmp; 1330 kauth_cred_t cred; 1331 int len; 1332 NFSKERBKEY_T key; 1333 struct mbuf **mdp; 1334 char **dposp; 1335 struct mbuf *mrep; 1336 { 1337 struct nfsuid *nuidp; 1338 u_int32_t *tl; 1339 int32_t t1; 1340 struct mbuf *md = *mdp; 1341 struct timeval ktvin, ktvout; 1342 u_int32_t nick; 1343 char *dpos = *dposp, *cp2; 1344 int deltasec, error = 0; 1345 1346 memset(&ktvout, 0, sizeof ktvout); /* XXX gcc */ 1347 1348 if (len == (3 * NFSX_UNSIGNED)) { 1349 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1350 ktvin.tv_sec = *tl++; 1351 ktvin.tv_usec = *tl++; 1352 nick = fxdr_unsigned(u_int32_t, *tl); 1353 1354 /* 1355 * Decrypt the timestamp in ecb mode. 1356 */ 1357 #ifdef NFSKERB 1358 XXX 1359 #endif 1360 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec); 1361 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec); 1362 deltasec = time_second - ktvout.tv_sec; 1363 if (deltasec < 0) 1364 deltasec = -deltasec; 1365 /* 1366 * If ok, add it to the hash list for the mount point. 1367 */ 1368 if (deltasec <= NFS_KERBCLOCKSKEW) { 1369 if (nmp->nm_numuids < nuidhash_max) { 1370 nmp->nm_numuids++; 1371 nuidp = (struct nfsuid *) 1372 malloc(sizeof (struct nfsuid), M_NFSUID, 1373 M_WAITOK); 1374 } else { 1375 nuidp = TAILQ_FIRST(&nmp->nm_uidlruhead); 1376 LIST_REMOVE(nuidp, nu_hash); 1377 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, 1378 nu_lru); 1379 } 1380 nuidp->nu_flag = 0; 1381 kauth_cred_seteuid(nuidp->nu_cr, kauth_cred_geteuid(cred)); 1382 nuidp->nu_expire = time_second + NFS_KERBTTL; 1383 nuidp->nu_timestamp = ktvout; 1384 nuidp->nu_nickname = nick; 1385 memcpy(nuidp->nu_key, key, sizeof (NFSKERBKEY_T)); 1386 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, 1387 nu_lru); 1388 LIST_INSERT_HEAD(NMUIDHASH(nmp, kauth_cred_geteuid(cred)), 1389 nuidp, nu_hash); 1390 } 1391 } else 1392 nfsm_adv(nfsm_rndup(len)); 1393 nfsmout: 1394 *mdp = md; 1395 *dposp = dpos; 1396 return (error); 1397 } 1398 #endif /* NFS */
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